# 2024 - Modified by MetaX Integrated Circuits (Shanghai) Co., Ltd. All Rights
# Reserved. Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.

include(ExternalProject)

add_definitions(-DPADDLE_WITH_FLASHATTN)

set(FLASHATTN_INCLUDE_DIR "$ENV{MACA_PATH}/include/flash_attn")

set(FLASHATTN_LIB_DIR
    "$ENV{MACA_PATH}/lib"
    CACHE PATH "flash-attn Library Directory" FORCE)

if(LINUX)
  set(FLASHATTN_LIB_NAME "libmcFlashAttn.so")
endif()

find_library(
  FLASHATTN_LIBRARY
  NAMES ${FLASHATTN_LIB_NAME}
  PATHS ${FLASHATTN_LIB_DIR}
  NO_DEFAULT_PATH
  DOC "Path to FlashAttn library.")

message(STATUS "flash-attn library: ${FLASHATTN_LIBRARY}")
get_filename_component(FLASHATTN_LIBRARY_PATH ${FLASHATTN_LIBRARY} DIRECTORY)
include_directories(${FLASHATTN_INCLUDE_DIR})

add_library(flashattn INTERFACE)
